From a combination of the root, niv- meaning snow in Latin, and vacÃo meaning empty in Spanish.
Nivacio is a gender related to snow, and the feeling of your gender being connected to snow, and also by less extension: ice and voids. It is related to the feeling and experience of "quietness", and snow that falls as such, unlike that of a blizzard which tends to be loud and chaotic; although this is just as intense as the aforementioned. It is related to the feeling of cold, and long-lasting winter.
The accent mark is not absolutely necessary. This was particularly made in mind with how it would be pronounced in Spanish, but I do believe the spelling above is quite close to how it would be pronounced in English.
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